Automatic telegraph.



I3 Sheets-Sheetl i.

Patented Mar. H, |902.

A. C. GILMHE. AUTUMATIC TELEGRAPH.

(Application led Apr. 22, 1901.\` (No Modei.)

Patented Mar.

A. C. GILMURE.

AUTOMATIC TELEGRAPH.

i3 Sheets-Sheet 2.

(Application fxled Apr. 22, 1901.)

Ho Mandel.)

(Nn Model.)

A. C. GILMOHE.

AUTOMATIC TELEGRAPH.

(Application led Apr, :22, 190k,

Paented Mar, H, i902.

I3 Shees-Sheet 3.

No. 695,203. Patemed Mar. il, i902.

A. C. GiLMOBE.

AUTOMATIC TELEGBAPH.

(Application led Apr. 22, 1901A 13 Shea ts-Shae 4.

llave/Q01" i fil/m4@ No. 695,203. Patented Mar. Il, |902.

A. C. GILMORE.

AUTOMATIC TELEGBAPH.

(Application led Apr. 22, 1901.)

(HG Model.) I3 Sheets-Sheet 5.

Patented Mar. Ii, |902.

A. C. GILMBRE. AUTOMATIC TELEGRAPH.

(Application filed Apr. 22, 1901.)

(No Model.)

Patented Mar. Il, 1902. A. C. GILMORE.

AUTUMATIC TELEGRAPH.l

(Applicazinn'fued Apr. 22, 19o1.\ (No Model.)

No. 695,203. Patented Mar. Ii, |902.

A. GILMOBE.

AUTOMATIC TELEGRAPH.

(Application filed Apr. 22, 1901.)

(No Model.) I3 Sheets-Sheet 8.

@@CQQQQ@ i Q m n4 l o i C) C) 0 a @"W G (D C) C) O C) (D Q (D -o Q U G(D O C) C) Q 0.

Y Patented Mar. il, i902. A. C. GILMRE. UTMATIC TELEGRAPH. (Applicationleni Apr. 22, 1901A E3 Simms-Sheet 9.

(No Model.)

No. 695,203. Patented Mar. H, |902.

A. C. GILMURE.

AUTOMATIC TELEGRAPH.

(Application filed Apr. 22, 1901.1

i3 Shees-Sheei I0.

(No Model.)

No. 695,203. Patented Mar. H, i902.

A. C. GILMURE. AuToMATlc TELEGRAPH.

(Application led Apr. 22, 190i.)

Patented Mai. n, |902.

Y. 77101411791". 1%# f a. Jferneys,

I3 Sheets-Sheet I2.

A. C. GILMORE. AUTOMATIC TELEGRAPH.

(Apphcatxon filed Apr 22 19015 (No Model.)

No. 695,203. Patented Mar. Il, |902.

A. C. GILMUBE.

AUTOMATIC TELEGRAPH.

(Application led Apr. 22, 1901..

I3 Sheets-Sheet I3.

(No Model.)

NES

UNITED STATES" PATENT OFFICE.

ALFRED C. GLMORE, OF CHICAGO, .HNOIS AUTOMATlC TELEGRAPH.

SPECIFICATION forming part of Letters Patent No. 695,203, dated Marchil, 1902.

Application filed April 22,

and dash signalsof a code similar to thatA used in the Morse telegraphmay be transmitted over a single line and in which the signalsare madevat the receiving end by means operated by separate electrical devices,which are quick and. slow acting -to respectively correspond to thedot-and-dash signals of the code. The signals are transmitted by aseries of separate linger-keys similar to i may be verified and allmistakes easily noted and corrected. Preferably, also, both thetransmitter and receiver are attached to a single type-writer or similarprinting device, and suitable means are provided whereby the instrumentmay be set to operate either as a transmitter or. receiver. lt will beunderstood, howcveig'that this construction is not necessary and thatthe transmitter and receiver may-be, if desired, mounted upon separateinstruments.

The instru ments are provided with the typebars, paper-carriage,'&c., olthe ordinary typo-writer, and both transmitter and typewriter areoperated by the same series of iinger-keys in sending' a message.

As above stated, the instrument is designed to transmit the ordinarydot-and-dash signalsot a suitable code and render such signals uniformand distinct. The operator,

1901. Serial No. 56,924. (No model.)

too, is relieved from liability of' operators cramp, which is oftenimposed by the con-v stant use of the ordinary transmitter. Thetransmitter could be used to send signals to an ordinary Morse sounderwith great advantage over the system now in use, but is particularlydesigned to be used in connection with my improved printing-receiver. Itis to be understood, however, that the transmitter as a separateinstrument forms no part of the present invention, but that the.

essential features of the saine herein disclosed are described andclaimed in a separate application filed by me upon January 2li, 1902,Serial No. 91,787.

Printing-telegraphs and like selective apparatus heretofore designed useeither the expensive mnltipleswire system or the singlewire system 'withsynchronously-operating motors or type wheels. Othersingle-wire systemsoperate by transmitting a number of electrical impulses, a diierentnumber for each character, er impulses of opposite polarity or ofdifferent strengths of current. 'ihese systems are either easilydisarranged by weather conditions or otherwise, slot',Y in operation, orare of such a nature that they cannot be used in connection with theduplex and quadruplex systems of telegraphy. In the system devised by methe ordinary uniform current impulses of two different lengths (the dotand the dash) of the code are employed, which byAa particulararrangement of electrical magnets are caused to actnate a signalmakingswitch to close local circuits at the receiving-station, which localcircuits by suitable means operate thesignal-making means or thetype-bars of a type-writer of ordinary construction or a similar machineto properly record the message. .This system has the advantage that itis not easily aiected by.

weather conditions, maybe used with duplex and quadruplex systems, andpossesses 'the further advantage that the selective apparatus,signal-maker, or printing device to be operated maybe placed in a localcircuit which -is controlled by a relay actu ated rom the line-circuit,which is of coursenot possible in systems depending upon currentimpulses ci dilt'erent strength. The signalsgmay be transmitted over thewire to the improved receiving instrumeut by any suitable transmitter7preferably IDO of print, and means are provided to automatically rotatethe cylindrical platen of the typewriter to properly space the linesupon the paper. By this arrangement the operation of the instrument asareceiverv is rendered entirely automatic and there i's no necessity forthe presence of an operator as the message is being recorded.

The' particular form selected to illustrate myinvention is shown in theaccompanying drawings and set forth in the vfollowing de- Iscri'ption,and the invention is particularly pointed out in the appendedv claims.

In the drawings similar reference charac-v ters apply to similar pantsthroughout. Figure 1 is a view in sectional elevation of the combinedautomatic transmitting and remitting device.

ceiving mechanism as applied to atypewriter of ordinary construction,parts being omitted for the sake of clearness. Fig. 2 isa plan view ofthe upper part of the type-writer and attachments. Fig. 3, is a rearelevation of the same. Fig. 4 is a'detail plan view of thecarriage-return,,mehanislng parts being shown in cross-section. grfFigAjis a detail view in vertical sectioniltaken on the line aa' of Fig. 4.Fig. ilis a detail end view of parts Shown in Fig. Figi@ is a detailview in vertical section ,taken on'the line 5 5 of Fig. 42. Fig. 5 is adetail view in vertical section of the carriage-return gealring.' Fig. 5is a.

/det'a'il view in vertical section of the transshowing the transmittingmechanism and operating-motor. Fig. 6 is a'view in vertical l.section ofthe same. Fig. 7 is a detail view in vertical section of theline-spacing mechanism.- Fig. -7 vis a detail view in vertical elevationof parts shown in Fig. 7. Fig. 7" is adetail plan view of thetransmitting device with the `contactfingers `or transmitterswitchesomitted for the sake of clearness. Fig. 8 is a plan view of thereceiver-switchboard.- Fig. 9 is a view in vertical section of thereceiver-switchboard, taken on the line 9 J oi' Fig. S. Fig. 9 is adetail view of the switch-return mechanism, parts being shownincross-scction. tail sectional views of the Shifters for the switchmechanism. Fig.' 0 is a-detail sectional view of part offthe 'switchmechanism. Fig. lO is a perspective'view of the univei'sal switch neehanisi'n and connected parts. Fig. 11 is a detail plan viewa-clrcuitcontroller Fig. 6 is a view in vertical. elevation of the rearend of the type-writer,

11a is a sectional view taken 'on the line a a of Fig. 11 in thedirection of the arrows.

arrows. Fig. 12 is a diagrammatic view .of the receiver-switchboardcircuits. Fig.1 3 is a diagrammatic view of the operating-circuits vforthe instrument.

"In' the drawings I have illustrated my improvements as appliedto thewell-known typewriter of Remington style; but it will be understood thatitmay be applied to other forms departure from the invention.

' In Fig. 1 the instrumentis shown mountedupon an inclosing casing A,containingjthe magnets for loperating the type-bars ofr theltype-writer. The type-writer comprises the baseframe B, mounted uponsupports b, by which lit is secured in place over an. opening a in thetop of case A. It is providedwith the usual top plate b', supported fromframe B by the corner-posts ZF. Carriagefguideways c. are mounted uponvthe topplate b', upon Type-bars d' are pvoted inA the usual manner toaring cl2 on the top plate. The lingerlever form, arranged side by side,and exmon fulcrum (Z3. Springs cl4 are interposed between a suitablecross-bar (Z5 and the sepa# the normal elevated position against thestop'- bar di. Connecting-links di are pivoted to the tailpieces of thetypebars d Aand are pivoted to the separate key-levers. chine is alsoprovided with the usual spacebar d9 'and universal bar d10. For the sakeof clearness the carriage-operating mechanism is omitted from Fig. 1 andonly two of the type-bars are shown, it being understood that the otherkeys and connected parts al'e similarly constructed. This is au ordinaryform of type-writer construction andneed not be more specificallydescribed. v

Transmttng mechanism. Upona rear extension of the main frame B ismounted` the transmitter base-plate e, of metal, secured thereto andseparated therefrom by suitable carried the upwardly-projecting studse2, pro vided with-pointed adjustable screws e3, which formcone-bearings for a rotatable contact. cylinder E. The contact-cylinderis divided by inlaid strips et, of insulating material, into a'seriefefcylindrical contact surfaces or rings e, one foreach character ot thecode to be transmitted, as shown in Fig. 7l', and -each ring eiis`divided by inlaid insulated as shown in Fig. 5".v The contact-surfacesvary with each separate ring e in keeping with the letter, character,word', or signal `to keys D of theinstrument are of the usual ratekey-levers, so as tot hold4 said keys in for the switchboard-restoringmagnet. Fig. Y

Fig. 1.1b is a similar sectional view taken on i the line bb of Fig. 11in the direction of the of ordinary type-writer construction without 4.

which travels the paper-carriage C,provided ,I -with the usualrevolvingpaper-platen c.

tend from the keyboard` back to the com-v :o5 suit-ably secured to jacksdi', which in turn are The ma- IIO- pieces into a series of long andshort con tacts,

reo insulated supports e. Upon the plate eare he transmitted by thatparticular ring. Fig. shows a ring provided with a series of contactsdesigned to send a longand three short impulses, a dash and three dots,which by the Morse code signifies the letter l A metal upright f ismounted upon the base-plate e and is preferably cast in piece therewith.The upright is provided at its upper edge with a series of projections,between which are pivoted upon a rod j" a series of transmitter-switchesF, one for each ring or series of contacts c5 upon the contact-cylinderE, and with which contacts the inner ends or toes off thetransmittcr-switches are adapted to engage. Switches F are provided withV- shaped tailpieces f2 and are normally held out of engagement with thecontact-cylinder by a series of upright spring-latches fi, suitablysecured to the baseplate e and provided at their upper ends with pointedoltsets fi. The pointed offsets f4 are normally in engagement with theupper faces of the Vfshaped tailpiecesf2 to hold the transmittenswitehesout of contact. Each of the switches .F is provided with a'lorwardly-projeeting springstrip f5, each 0E which is connected byilexible thread or wire ff to its corresponding linger-key D,thusforming loose one-way connections between the hey-levers and thetransmitter-switches-that is to say, whenever one of the key-levers isdepressed the corres JondinY switch will be thrown into eontact with thecylinder, but the return of the key-lever to its normal upright positiondoes not elect the depressed switch. When any one of thetransmitter-switches l" has been depressed into engagement with therotatable contact-cylinder E, it is held into engagement therewith bythepointed projectionfikv switch-lever F is thus held into engagement withthe proper ring or series of contacts c5 upon the rotating cylinder. Thecircuit can then be traced from wire l0 to binding-post ll upon the'oase-plate c, through the baseplate Ato upright f, switch F,contact-cylinder E to the upright standards or studs e2, which areconnected to the line by vwires l2. The successive long and shortimpulses (dots and dashes) to complete the signal are produced byvariation in length ol the metallic parts ol the various rings ci". Itis obvious that the transmitting instrument may be utilized to transmitlthe code combinations of long and short impulses through a localcircuit in which is located a relay or pole-changer which willserve totransmit the impulses to the line. After the signal has been given thetrans militer-switch F is automatically returned' to its normalposition, with the pointed portion j of spring j incngagement with theupper face of tailpieeef2 by a projecting longitu.

dinal strip e, of insulating material, on the rotating cylinder E. Thisstrip c6 extends the entire length ci the cylinder, so as to eu.

' tical direction.

.depending from the top plate b'.

gage near the end of the rotation thereof with any one of the series oftransmitter-switches `rear of the frame of the instrument is se-Y cureda plate gfto which is adjustably secured the frame of a small electricnfotor G. Upon the plate g is' a rectangular block g', which iits in alongitudinal guide-slot g2 in the inner side of the motor-frame. vIn theblock g' and plate g is threaded an adjustablethumh-screw g3, which isprovided with a shoulder engaging a suitable clampingplate g4, whichextends on either side oi. the slot g2 in the inner side of themotor-frame and which may be pressed into engagement with such side. Bythis means the frame and 1notor carried thereby may be adjusted inaverleneath and to one side of the motor is a U-shaped frame H, suitablysecured to and extending upwardly from the hase-plate e. Upon the upperend of the U-frame ll is suitably mounted a train of gears 7L', 71?, h3,and h4, gears h" and h2 mounted upon the shaft r'" and gears h3 and h onstud-shaft h. chen the instrument is set tor transmitting, the motorwill be lowered until the pinioii` gli upon ils armature-shaft is inengagement with the gear it'. By this means the train ot gears will becontinuously rotated in the-direction of the arrows. (See Figs. 6 and(W.) Upon the shaft ot the contact-cylinder E is fixed a mutilated gearci', in position to be engaged and rotated by the gear L of the train.Also fixed upon the shaft of the 'contactcyliuder is a circular cam-diskes, provided on its periphery with a notch e, as shown in Fig. 5". Tothe under side of the base-plate is pivoted a short forwardly-extendinglever i, to which is pivoted a spring-pressed hooked detent or pawl t',provided with any i'usulatiugsection '/l, which normally engages thenotch ci oi' the cam-disk 0'. The inner end of the lever l. is providedwith a bent upright 2, through the outer end oi' which lis adjustablythreaded a thumh-screw it This thum`u-serew abuts against a rock-arm t,pivoted to a hanger The lever I and its connected parts are normallyupheld, with the thumb-screw 3 in engagement with arm by means of aspring fi, inter- 'posed between the frame ll and the lever.

The rock-arm t" is the meanseinployed in the ordinary typewriterconstruction for operai. ing the carriage-escapement and is operativelyconnected by a link il to the universal bar d10. Since the universal barextends in thr well-known manner transversely beneath all ofthokey-levers, it is obvious that when IGC IIO

y any key-.lever is actuated the'lev'er I and its connected parts w-illbe depressed, and by means-oi' the detent L' an initialpar'tial'revolution will be impartedl vto the-shaft ofthecontact-cylnder E. This will bring the teeth of the mutilated ear e7into enra'ement with r the teeth ofthe gear h, and the motor, willelution of thel contact-cylinderv the stop-pawl -L' will ride upon thecylindrical surface ofthe cam-disk` eQ until it hascompleted a singleengage' the notch e,'and the switch-lever F..

Ils

revolution, at which point the mutilated portion of the gear eiwill-comeopposite the teeth of gear 7a2-aud the pawl will again -which has beendepressed by the finger-key D, will be-restored to its normal positionby theVinsulating-strip e upon the contact-cybinder. All parts are thenagain in position to transmit any desired signal. I

Inorder that the signals shall be transmitted uniformly and distinctly,it is desired that the speed of the rotation of thecontact-cylinder E'shall be unifprm and that such speed may be regulated as desired. areaccomplished by the following means: TheA motor G is operated by acircuit from a local battery-13, which is connected by suitableleads 14and 15 to the binding-posts 16 and 17 upon a plate 96, of insulatingmaterial, secured to the upper end of the motor-frame. Inl the circuitbetween binding-posts 16 and 17is interposed a suitable governingmechanism K, which is mounted upon the lU-frame H. A strip 7c ofinsulating material', carrying a spring-contact k', is mounted uponasere'wthreaded rod k2 and a guidi'ngerod les: These rods arelongitudinally supported uponv a frame H, as shown in Fig. .3. Upon theshaft h5, which is continuously rotatedby the motor, as previouslydescribed, is mounted a small centrifugal ball-governor ki, of usualconstruction. The ball-governor 7a4 carries a switch cf, which isarranged to engage thel spring-contact k'. One side of the motor isconnected by wire 18 with the binding-post 16, and the other side isconnected to the lever of a switch 19, mounted upon an'insulatf-fing-plate ga. The binding-post 17 is connected by a lead 28 to the frameand .thence by wire 20 to the U-frame Hfand the spring-contact la isconnected by a lead 21 with the contact 22 of the switch 19. The circuitis then completed from binding-post 16 through the mo- -tor by lead,41S), thence to switch 19, and by v wire 21 tospriug-contact 7e', toswitch 7.35, from thence through the metal of the U-frame Il and lead20, frame, andwre 28 to the bindingpost 17. When, however, the speed isexcessive, the governor will break the circuitand -reduee the speed inthe well-known manner.

The insulating-strip la ish spring-held in one direction by a spring7c', coiled about-the threaded rod 7:?, and the latter is provided Theseobj ects g with-a thumb-nutfks, so that the position of the strip maybel shifted and the governing device set to give the desired operatingspeed. This operating-circuit-for the motor G is. clearly indicated inthe diagrammatic view, Fig. 13. I l Automatic printing mechcmisha-When'the instrument is set to automatically receive and record anincoming-message, theitype# barsl and other parts of the type-writer areautomatically operated by a series' o f magnets located in a localcircuit. This circuit is closed by a selective signal-making switchmechanism, which is operated by the dotand-dash electric impulses toclose the local circuit through the -'proper mechanism, Aand therebyoperate the correspond-ing type-bar or'other device. f l

Within. the box or casing A isconveuiently located a series'of magnets afor automaticallyoperating'the key-levers with their correspondingtype-bars and the universal bar of the instrument. (See Fig. 1.). InFig. 1 two` of these magnets are indicated, the remainder being omitted4for the sake ofclearness. The pivoted armatures v'f1.2 of the magnets aare connected by links as-to plates a4, which are pivetedto suitablestandards a5 opposite ends of these plates a4, which, in effect, formbell-crank'levers, are pivotally secured the linkse, which projectthrough IOC the opening a in the to'p of the magnet box or. casing A.4and are pivotally secured to the separate key-levers D. The links asanda are provided with, suitable turxibuckles* a7, by

which'theirlengths may be properlyadj usted. One of theoperating-links.ai is, as indicated inFig. 1, connected to the universalbar d10- of the type-writer.

and type-bar or'th'e'universal space-bar will be actuated, therebyprinting the message `upon the paper on the carriage-platen andadvancing the paper-carriage step by step-inthe mannerusual with theordinary type writer'.

thef'rame, as shown in Fig. 2. The step-byl m5 step feed 'of thecarriage is effeeted'by the mechanisnrillustrated in Fig. 5, which'is ofcommon construction and comprises 'the rock-'arm c", which is.operatively connected. to the universal bar d?"- throu'g'h'the ingdiumj-1 of lconnecting-link l and'rock-arm {Se} Fig."6.) The upper'end oftheroektargnfe is provided 'with the well-known tlsedaxxd loose dogs cand ci, which engage with they.

Ise

. upon the bottom ofthe magnet-box.l To the i By this means whenever thelocal circuit is closed through any one of 1 the magnets a' thecorresponding key-lever l v Us The paper-carriage frame Gis mounted, asusual, to travelba'ckand forth upon the type-J 'to the face of the gearZ4.

ratchet-wheel es. The ratchet-wheel as is mounted upc/n the end of ashaftco, jonrnaled within a block C10 upon the top plate of thetype-writer, and to the inner end of which shaft is secured a pinionel1,wl1iel1intermeshes with the teeth of a rack cl2, mounted uponl thecarriageC. This mechanism forms the eseapement of the well-knownRemington type-writer and need not be more fully descri'bedinthisconnection. Theratchet-wheel e8 is connected to vthe shaft c9 by theusual pawland ratchet mechanism '(indicated at cl3) in order to permitthe carriage C to be returned to its starting-point to commence a lineof print.

I provide means whereby when the mechanism is operating as a receiverthe carriage may be automatically returned to recommence a line ofprint, which comprises the following mechanism: Upon the rear end ofthev shaft e9 is fixed a beveled gear el", and upon the rear of the topplate b, within suitable uprightsZ, is journaled ashaft L. Upon thisshaft are fixed keyed and `loose clutch members Zand Z2. To the looseclutch member L2 is secured abeveled pinion ZS, which intermeshes withthe beveled gear' c upon the end of the shaft ci. Also mounted upon theshaft is a 4loose gear Z4, which is connected thereto through the mediumof a volute coiled The coils of the spring Z5 are held spring Z5. inplace by means of the bent arms Z6,secured Connected to the top plateintermediate the uprights Z isa depending arm ZT, which carries upon apair of stud-shafts the train of gearsZs, Z9; and ZIO.

The gear Z10 is positioned to interm'esh withA the gear Z4 of shaft L,and the gear ZS is so placed that it will be engaged with the pinion gTupon the inner end of the armatureshaft of'motor G when the latter israised to its upper position. The motor is so raised whenever theinstrument is set to act as a receiver,'which not onlybrings gear Q7into engagement with` gear ZS, but also disengages gear g5 upon theouter end of itsarmatureshaft from the train of gearing which serve tooperate the contact-cylinder E of the transmitting mechanism.

The usual margin stop-bar N is not fixed .as in the usual type-writerconstruction, but

is mounted upon the pintlesn and n' between the uprights n2 at the roarof the top plate of the machine, so as to permit of a slightlongitudinal movement. A rearwfudly-projecting arm n3 is connected tothe bar N, and its rear forked end engages the sliding clutch member Z',which is keyed to the shaft L, as shown in Fig. 4. The barN is normallyurged to they right, and thus tends to throw the 'clutch members Z' and'Z2 into engagement byl means of a spring n4, interposed between acollar 715 upon the outer end of pilntle n and the upright n2; but thebar N is normally held toward the left (see Figs. 4' and 4*) by means ofthe upwardly-spring-pressed armature o of the magnet O, whichis'sccured. to

the top plate of thc machine by means of the frame o. The armaturc 0 isprovided with a bent tailpi-eee o2, which is pressed into cngagementwith the upwardly-extending portion of the frame o' by means of a springvo3, so as to position said armature opposite the end of the pintle u ofthe bar N, and therebylock the rod in its normal position toward theleft. (See Fig. 41.) vUpon the rear of the top plate, between the upperends of the uprjghts n2, is mounted the usual carriageV guide-rod.014,-whicl1 carries a sliding sleeve reached the limit of its traverseat the end of a line of print. (See Fig 2.) Upon the upright n2 ismounted a suitably-insulated spring-contact 25, which is arranged to 'beengaged by a projection n upon the bar or switch N when the latter ismoved slightly toward the right. (See Fig. 4.) The operation of thisautomatic carriage-return is as follows: When theinstrument isset tooperate as a receiver, the lever of switch 19, which controls the localoperating-,circuit for the motor G, isplaced to engage its contact 26.This contact is connected by a lead 2.7 to thc spring-contact 25 uponthe' frame of the instrument. If the operator when sending a messagedesires to return the carriage of the instrument at the other end ofthe.line,he will transmit a special signal to close the localoperating-circuit through the magnet O, which, when energized withdrawsits armatre from engagement with the pintle n. This permits a slightmovement of the switch-bar N to ward the right under the influence ofspring n4. (See Fig. 1.) The motor-circuit will then be completed asfollows: from binding-post mechanism, aindfthe rotation of this shaftthrough the medium of the pinion e11 and rack cl2 will return thepaper-carriage to its starting-point against the tension of the springcontained in the casing c4 for the purpose of recommencing a line ofprint. The

weight of the carriage and connected parts,

as well as the tension of its operating-spring, Vis considerable, andforVthieremsonthe coiled spring l is interposed in the train of operatingmechanism. This spring permits the mo,- tor to start and acquiremomentumunder a light load, so that Aa much smaller motor may be employed thanif vthe loadwere'thrown at once uponthe motor as s on as started. Thecarriage thus travels toward the left in Fig. 2 until the part c16thereon comes into en gage; ment with an 'abutment' n?, adjustablypositioned upon the bar as shown in Figs. 2 and 4, By this` means thebar N is moved slightly toward the left, thus withdrawing the lug n fromengagement with the spring-contact and breaking the circuit through andstopping the motor. By this movement of the rod nv the clutch membersZand l2 are also thrown out of engagement, so as to permit the freierotation of `t he feed-shaft ci during the travel of the carriage in theopposite direction. The local circuit through the magnet O has been inthe meantime broken by the operation ot the selective switch, and itsvclearly indicated' in the diagrammatic view,

'armature o will be returned by its spring in 'upon the carriage willengage and close the spring-switch and 2l. The spring-contacts of thisswitch are connected by wires 25J-and 30 with the leads of the localcircuit through the magnet O. The magnet O will thusvbe energized andwill release the bar N, which then closes .the local circuit through themo- Y tor G and throws into engagement the clutch members Zand Z2, sothat the carriage willbeautomaticallyreturned in the manner abovedescribed. The circuits above described are Fig. 13.

The paper-platen c' is provided with linee spacing mechanism similar tothat usedin thel ordinary Remington type-writer, and which comprisesthehandle P, pivoted to the carriage,as at p, and which serves to operatethe rock-arm p', carrying at its upper end the pivoted spacing-detent p?and the fixed locking-detent p3. These detents engage with a suitableratchet p4, fitted to the end of the platen c'. A` spring-pressed arm p5is connected to the carriage and is provided at itsfree end with aroller engaging the teeth of ratchet 19 to frictionally hold the platen4against displacement. These parts, as above stated, are ot' the usualconstruction and need not be more fully'described. Means are providedwhereby this line-space 'mechanism may be automatically operated by thetransmission of a special signal over the line and also whereby it willbe automatically operated whenever the carriageis returned to the right--hand'end of the machine to commence a line of print. Sui'tably mountedupon the'car'- riage above the operating-handle Pis a magnet p6, havingdownwardly..projecting poles, which when the magnet is energized attracta plate-armature p7, secured to 'thearm P, as indicated in Figs. 2, 7,and 7. magnetp" is connected by the leads 3l and 32 in theoperating-branch of the local circuit. Whenever the transmittingoperator desires to operate theline-space of the instrument at thereceiving end, he will send a Aspecial signal over' the line, whichthrough the medium of the selective switch mechanism will close thelocal-battery-circuit through the magnet p and advance and rotate thepaper-platen through the desired line-space. l Anautomatically-operating switch is also provided for closing the circuitthrough the magnet p" whenever the carriage returns tothe right tocommence a line .of print. This switch comprises the contact-pins 3S andthe spring-contacts 3i, mounted upon a plate of insulatingmaterial pg,which is secured tothe upright n2 at the rear right-h and end of themachine, as shownin Figs. 2, 3, 4, and 4*?. The pins y33 are connectedby wires 35 to the leads 3l and 32 of the magnet p, and thespring-contactsfl, connected together at their outer ends by anvinsulating-strip 36, are connected bythe leads 37 to the local battery.An'u-pright 1), adjustably mounted upon the rear rearwardly-extendingbent arm pw; A cam- The- [OO of the carriage C, carries atits upper end'a i shaped switchel'osing device p is pivoted upon the end of the armp10, is weighted at its outer end, and provided. at itsinner end with astop p12, which engages the arm p10, as shown in Fig. 4, and preventsthe rotation of the switch-closer in one direction. the carriage isreturned toward the left, the switch-closer engages the spring-contacts34 of the switch and presses them into contact with the pins 33, thusclosing the circuit` through the magnet p and operating the linee spaee.Upon the return of the carriage toward the left the switch-closer pis'knockcd upwardly, when it engages the spring-con-l tacts 3l, and sofails. to close the circuit; but

When

ros

IIO

after it passes the switch it is returned to the...

normal, with thc Stoppl2 in engagement with the arm pl by its outerweighted end and in condition for again closing the circuit when thecarriageis again moved to the right.

Seleczfre switchmechanisms.-These mechanismsare allmounted upon asuitable switchboard R, with which each of the instruments will beprovided. -The signal-making or selective switch consists of aspring-strip s, se-

cured to one of the links 3 ofa universal suitable adjustable bearing-s3,iixed to the switchboard R. Link s* is also pivoted to one t3 and aloose pivoted dog t4.

yss

.mally extends approximately at right angles -switchboard R.

`loose dog is then spaced forward by the light o ne tooth, and when thearmature t is released and the shifter is depressed the loose dog willend of a link s', which extends normally in thel saine direction andapproximately parallelto the link Link s is pivoted at its. opposite endto a fourth link s?, which northereto and ispivoted within an adjustablebearing s, fixed on 4the switchboard. It will be observed that links S2and S5, extending approximately at right angles to each other, and thatsprings s, coiled. about their journaled ends, tend toA swing them indirections at right angles to one another, as indicated by the arrows inFig. 8,'so that by properly combining these two motions the switch s canbe caused to contact with any one of a series of contactpins 3S placedin intersectingrows in a plate 39, of insulating material, secured. ltothe Mounted on the switchboard opposite the journaled ends of links s2and .S5 are electromagnets T and U, provided with suitable rockingarmatures t and u. These magnets are vconnected in series in the samecircuit and are when the instrument is acting as a receiver connected toor operated from the main line. Magnet T is a high-resistance orquick-acting magnet, and its armature is provided with a-ligh't spring,so that it responds to all electric impulses, both the dashes and dotstransmitted over the line, and .magnet U is a relatively low-resistanceor slow-act'- ing magnet and its armature is provided with a relativelyheavy spring u and only responds tothe long electric impulses or thedashes. Connected to the armature t is a rocking shifter t2 for the links2, which shifter is provided atits outer end with a rigid dogRelatively light and heavy strip-springs t and t are arranged to engageopposite faces of the pivoted dog 4. On the link s2 is a segment S7,provided with ratchet-teeth and with which the loose dog t* normallyengages, as indicated in Fig. 9, in which position it is pressed againstthe light spring t5 land away from the relatively heavy spring t6.' Whenthe armature t is attracted and the rocking arm or shifter is raised,the loose dog t* is thrown out-of and the fixed dog t3 is thrown intoengagement with the ratchet-teeth of the segment 37. The

springinto the position shown in Fig. 9C. In this position therelatively heavy spring t acts as a stop for the dog 154, so that thelatter' will be-spaced ahead through the distance of engage with thenext succeeding tooth upon the ratchet S7. The link s2 is then free to'be shifted by its spring S9 one step in the direction of the arrow. Whenthe link s2 is returned to its normal position in the manner hereinafterdescribed, the ratchet-teeth on the segment S7 will move past-'the dogt4, the latter being shifted against the tension of the heavy spring6,1215 indicated in Fig. 94.0 .This peculiar esc'apement is 'simple inconstruc.

lfrom the pin U12.

-tion, not liable to get out of order, and effects n3 and 'n4 operate toshift the link S5 one step at a time in the direction of the arrow (seeFig. S) by operating upon the toothed segment ss of that link.

As already stated, the quick-acting or dot magnet T is operated by allimpulses coming over the line, whereas the slow-acting or dash magnet Uis only operated by the long impulses. To prevent the dot-shifter fromoperating when a long impulse is re-y ceived, a small magnet a5 ismounted upon the switchboard,and its armature tt is mounted upon the endof a longitudinally-sliding metal rod u?, pressed by a spring u8,'coiledabout the rod toward the left, as shown in Fig. 8. The magnet a5 isenergized by a branch of the local circuit, which is closed through thesame whenever the armature uv is drawn up by means of a spring-contactswitch'u10 upon its armature u and a contact-pin u on the metal frame ofthe'magnet.. AThe-armature u6 and sliding rod nl will thus be drawntoward the right against the tension of thespring u8, and anupwardlyprojecting bent pin um upon the end ofthe rod engages the loosedog t* of the shifter t* of the dot-magnet'an-d prevents it from beingmoved forward by its spring as the shifter is raised. As. the armature uwill be rocked by its beaver spring before the armature t, it isnecessary to provide a shunt in the branch of the local circuit, Awhichpasses through the magnet a5 and which is closed as soon as the bent pinu12 engages the dog t4. The magnet will thus remain energized and thedog t? IOO will remain locked until the armature tis released and theshifter t2 and dog t* drop away By this means the dog t4 will drop backinto engagement with the teeth of segment s7 without having stepped thelink s2. The rod ul, carrying the armature us and locking-pin u12,.isnormally heldl toward the left by the spring 'Lts against a stopte,which engages a collar on the rod, and the end of the armature u isnormally'held by its spring against a pin u, provided with an insulatingbearing-point, so that the circuit through the magnet it is normallybroken.

As shown inA Figs. 8 and 10, the contactpins 38 are arranged in the pathoftravel of the selective switch s in a series of concentric lateral andtransverse rows, and are so located that the switch in its step-by-stepmotion,

produced bythe Shifters of magnets Tand U,

engages with any-one of such pins. The series of contact-pins 38are-connected by suitable leads to the series of signal making orprint-v operating branch of the local circuit. IIt 'is

